Gadget integration TODO

Things to do to integrate Gadget with the rest of the system.

Gadget

Should not return himself in buddy queries (and probably not activities which we are already taking part in activity queries).
Correctly manage size of open views
~~Support buddy views properly~~
Add CurrentActivity protocol
Text search

Start to review this big branch. Be aware that the first set of patches is very old (prior Gadget implementation) so it could be a bit outdated.
~~BuddyInfo.GetActivity should return activities from view~~
Because of this ejabberd bug, client still use PEP nodes instead of just rely on Gadget. We should be sure everything works fine when this bug will be fixed.
Implement "search from text input"
~~Manage BuddyInfo current-activity from views~~
~~When receiving a buddy properties change message, we should update properties stored in views~~
~~Handle join and left messages~~
~~Fire BuddyInfo.ActivitiesChanged when needed~~

The inspector shouldn't appear as an activity member. When sharing a Connect instance, the inspector joins the room so we are suppose to play with it.
The SearchAvailable signal is a bit crack. Would be cool to drop it.
Because of this ejabberd bug, client still use PEP nodes instead of just rely on Gadget. We should be sure everything works fine when this bug will be fixed.
Extend D-Bus API for search queries. See Presence Service D-Bus API

This branch is currently just used for tests. Sugar requests 10 random activities in MeshModel.py, that's probably not the best place to do that.
Make the number of random buddies and activities requested configurable
Implement UI for searches (not a priority as for now we'll focus on random queries)